PHP YAML extension (#1798)

DOCUMENTATION/content/documentation/index.md

@@ -1599,6 +1599,21 @@ will set the clock back 1 day. See (https://github.com/wolfcw/libfaketime) for m
 
 
 
+
+<br>
+<a name="Install-Faketime"></a>
+## Install YAML PHP extension in the php-fpm container
+YAML PHP extension allows you to easily parse and create YAML structured data. I like YAML because it's well readable for humans. See http://php.net/manual/en/ref.yaml.php and http://yaml.org/ for more info.
+
+1 - Open the `.env` file
+<br>
+2 - Search for the `INSTALL_YAML` argument under the PHP-FPM container
+<br>
+3 - Set it to `true`
+<br>
+4 - Re-build the container `docker-compose build php-fpm`<br>
+
+
 <br>
 <a name="phpstorm-debugging"></a>
 ## PHPStorm Debugging Guide